If I dont use SMPS in STM32H757xI how connect VLXSMPS

Ronil · ‎2025-04-07

Hello, in my plan, I want to use a standart power supply (LDO) for STM32H757xI in package WLCSP156.

In the manual for STM32H757xI I didn't find any information on how it should be connected

Is it correct ?

VLXSMPS (GND)

VFBSMPS (GND)

VSSDSI (GND)

VSSSMPS (GND)

VDDSMPS (GND)

Andrew Neil · ‎2025-04-07

https://www.st.com/resource/en/reference_manual/rm0399-stm32h745755-and-stm32h747757-advanced-armbased-32bit-mcus-stmicroelectronics.pdf#page=274

See also AN4938, Getting started with STM32H74xI/G and STM32H75xI/G MCU hardware development:

https://www.st.com/resource/en/application_note/an4938-getting-started-with-stm32h74xig-and-stm32h75xig-mcu-hardware-development-stmicroelectronics.pdf

via: https://www.st.com/en/microcontrollers-microprocessors/stm32h757xi.html#documentation

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

View solution in original post

Andrew Neil · ‎2025-04-07

https://www.st.com/resource/en/reference_manual/rm0399-stm32h745755-and-stm32h747757-advanced-armbased-32bit-mcus-stmicroelectronics.pdf#page=274

See also AN4938, Getting started with STM32H74xI/G and STM32H75xI/G MCU hardware development:

https://www.st.com/resource/en/application_note/an4938-getting-started-with-stm32h74xig-and-stm32h75xig-mcu-hardware-development-stmicroelectronics.pdf

via: https://www.st.com/en/microcontrollers-microprocessors/stm32h757xi.html#documentation

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.